Device and method for controlling the application height of a ro

Details Device and method for controlling the application height of a ro Device and method for controlling the application height of a ro

1997-11-12

2000-02-22

Lisehora, James A.

Road structure, process, or apparatus

Process

In situ treatment of earth or roadway

404 841, 404 848, E01C 1922

Patent

active

060272821

ABSTRACT:
A control device for controlling the application of a material which is adapted to be applied to a subgrade by means of a road finisher, said road finisher comprising a tractor and a floating screed, which is attached by means of at least one drawarm to the tractor in such a way that said screed is arranged behind said tractor in the direction in which the road finisher is moving when in operation, a first end of said at least one drawarm being secured to the tractor by means of a vertically adjustable coupling device, and a second end of said at least one drawarm being rigidly secured to the floating screed, said control device comprising a device for detecting the height of a screed edge in relation to a reference height, said screed edge being the rear lower edge of the screed in the direction of movement. The control device further comprises a device for detecting the inclination of said at least one drawarm in relation to a reference plane. A device for controlling the height of the vertically adjustable coupling device controls the height of said vertically adjustable coupling device on the basis of the detected inclination and the detected height of the rear lower edge of the screed.

REFERENCES:
patent: 4925340 (1990-05-01), Heiser et al.
patent: 5009544 (1991-04-01), Chaize
patent: 5356238 (1994-10-01), Musil et al.
patent: 5393167 (1995-02-01), Fujita et al.
patent: 5401115 (1995-03-01), Musil et al.
patent: 5549412 (1996-08-01), Malone
patent: 5752783 (1998-05-01), Malone

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